21257109

素因数分解:

$3^2\times {\mathrm{653}}^1\times {\mathrm{3617}}^1$

素因数の和:4276

約数の個数: 12

約数和(自身を含む): 30760236

約数和(自身を除く): 9503127

約数列:

[1, 3, 9, 653, 1959, 3617, 5877, 10851, 32553, 2361901, 7085703, 21257109]

約数ペア:

[(1, 21257109), (3, 7085703), (9, 2361901), (653, 32553), (1959, 10851), (3617, 5877)]